22-Mev Electron Linear Accelerator

Abstract

This paper describes a 22‐Mev electron linear accelerator of the traveling‐wave type with several unique features. The features include the combination of an rf driven prebuncher cavity and a buncher of a new type in the first section of accelerator guide in order to obtain high‐peak currents and minimum beam energy spread. A separately pulsed gun grid provides fast beam pulse rise time for use in neutron research. The accelerator and major electronics are housed in a single rf shielded rigid cabinet, which facilitates portability for field operations. The beam energy is continuously variable from 2 to 27 Mev; peak current for a one‐μsec pulse is 380 ma; pulse rate is variable from 1 to 200 pulses per second; pulse length is variable from 0.2 to 2.4 μsec; and pulse rise time is adjustable from 0.2 to 0.4 μsec.